using System.IO;
using StardewModdingAPI.Toolkit;
using StardewModdingAPI.Toolkit.Framework.GameScanning;
using StardewModdingAPI.Toolkit.Utilities;

namespace StardewModdingAPI.Installer.Framework;

/// <summary>The installer context.</summary>
internal class InstallerContext
{
    /*********
    ** Fields
    *********/
    /// <summary>The underlying toolkit game scanner.</summary>
    private readonly GameScanner GameScanner = new();


    /*********
    ** Accessors
    *********/
    /// <summary>The current OS.</summary>
    public Platform Platform { get; }

    /// <summary>The human-readable OS name and version.</summary>
    public string PlatformName { get; }

    /// <summary>Whether the installer is running on Windows.</summary>
    public bool IsWindows => this.Platform == Platform.Windows;

    /// <summary>Whether the installer is running on a Unix OS (including Linux or macOS).</summary>
    public bool IsUnix => !this.IsWindows;


    /*********
    ** Public methods
    *********/
    /// <summary>Construct an instance.</summary>
    public InstallerContext()
    {
        this.Platform = EnvironmentUtility.DetectPlatform();
        this.PlatformName = EnvironmentUtility.GetFriendlyPlatformName(this.Platform);
    }

    /// <summary>Get the installer's version number.</summary>
    public ISemanticVersion GetInstallerVersion()
    {
        var raw = this.GetType().Assembly.GetName().Version!;
        return new SemanticVersion(raw);
    }

    /// <summary>Get whether a folder seems to contain the game, and which version it contains if so.</summary>
    /// <param name="dir">The folder to check.</param>
    public GameFolderType GetGameFolderType(DirectoryInfo dir)
    {
        return this.GameScanner.GetGameFolderType(dir);
    }
}
